Segmentation fault on public key authentification - openssh

This is a discussion on Segmentation fault on public key authentification - openssh ; Hello list,
after some weeks of operation and updates one server of mine needed a
reboot.
Now authentification with public key causes a segfault.
System information:
2.6.8-gentoo-r4 x86_64 AMD Dual Opteron(tm) Processor 242 AuthenticAMD
Debugging information:
// ssh fom node2 ...